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Hydraulic Crane continued #1: The boom

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Blog entry by Pjonesy posted 06-30-2016 03:35 AM 749 reads 1 time favorited 3 comments Add to Favorites Watch
no previous part Part 1 of Hydraulic Crane continued series no next part

After a little advice from Bruce #4 I am hoping that this series on the Hydraulic Crane becomes a bit easier to follow.
First up is a little tip on how to make the hydraulic ram parts work a little better. If you ever get a set of verniers out and measure dowels etc you will find that not many are very accurately produced and therefore when you bore a 5/16 hole for a 5/16 dowel it doesn’t always slide in smoothly. I usually end up boring the hole 1/64 oversize and then fitting a reasonably tight O ring as shown in the next photo. When the end cap is glued down no one will ever know what you did.

Hydraulic Crane 32 photo IMG_7134_zpsbwl8sxll.jpg

Next part about the boom is to help the tubes to stay locked in place when extended and also give you a locating point when extending the boom as it just clicks into place both ways.
The way I have done this allows the boom to be pulled all the way out if needed as well.
The idea is to glue a 1/2 of a 1/8 dowel onto the tongue of the boom as shown in the next photo, a corresponding recess needs to be made in the adjacent tube to accept this dowel.
Hydraulic Crane 33 photo IMG_7137_zps6l9jtrry.jpg
Next is the end photo of the tube showing the small plastic “spring” inserted to help keep enough compression on the 1/2 dowel to keep it nicely in place but still allow for ease of movement in the tube.
Hydraulic Crane 34 photo IMG_7138_zpsrwy0o1gq.jpg
Next couple of photos show the progress so far.
Hydraulic Crane 37 photo IMG_7146_zpszs1tgovd.jpg
Hydraulic Crane 36 photo IMG_7143_zpsko1nskng.jpg
Hydraulic Crane 35 photo IMG_7141_zpsalmx9hus.jpg

-- Peter New Zealand



3 comments so far

View htl's profile

htl

2207 posts in 624 days


#1 posted 06-30-2016 08:51 PM

Outstanding how2 on an outstanding project, you got it all figured out now Peter.
Nicely done!
Peter ain’t is nice over here where there Are lively people that what to see what you’ve been up to?
There are a few animules around but they stay mostly in the POND. :-]

-- There's a hundred ways to do anything, alot depends on the tools at hand.

View Dee1's profile

Dee1

193 posts in 1353 days


#2 posted 07-01-2016 03:06 PM

Great tip thank you so much.
also very nice looking project I was going to do that one next but got sidetracked into another one for a present to a Son in Law.
Your pics are great again thanks.
Dee1

View Dee1's profile

Dee1

193 posts in 1353 days


#3 posted 07-01-2016 03:08 PM

Great tip thank you so much.
also very nice looking project I was going to do that one next but got sidetracked into another one for a present to a Son in Law.
Your pics are great again thanks.
Dee1

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